I believe the answer is B, primary active transport. Root hair cells in plant use active transport to absorb mineral ions such as nitrates from the soil. The concentrations of minerals in the soil are lower in the soil than in within the root hair cell, therefore the transport will be against the concentration gradient which does not favor diffusion, therefore the pant has to use active transport.
Answer:
b. to alert communities to potential health risks
Explanation:
Vog is defined as the form of air pollution which is caused by the emission of sulfur dioxide and other particles formed due to reaction of oxygen and moisture with volcanic gases in the presence of sunlight.
Scientists or volcanologist study vog to save life of people around the volcanic sites. As volcanic eruption can cause several helath risks<em> such as suffocation, respiratory problems, skin diseases, eye injuries and conjunctivitis.</em>
So, They predict the health risk by evaluating different gases in the vog and alert people to take precautions to be safe.
Hence, the correct option is b.
Answer:
<h2>Meiosis I</h2>
Explanation:
1. Meiosis (meiosis I and meiosis II) produce four daughter cells from a single cell, each daughter cell contains half the number of chromosomes as compared to parental cell.
2. Meiosis have two cycles , i) meiosis I and ii) meiosis II.
3. In meiosis I, chromosomes first go replication and become double. It is the first step (meiosis I) that generates genetic diversity. During prophase I of meiosis I, homologous chromosomes pair and form synapses, a special step of meiosis.
4. There is crossing over in meiosis I which produce genetic diversity.
5. The four cells produced from a single cell become genetically different due to crossing occur which occur in meiosis I.
